MT ST HELENS NATIONAL VOLCANIC MONU
PWS ID: WA53FS102 · Amboy, Washington 98601
Population Served
95
Total Violations
32
Health-Based Violations
1
Water Source
Groundwater
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Federal
- Connections
- 17
- County
- Clark
- School/Daycare
- No
- MCL Violations
- 1
- Monitoring Violations
- 30
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 7 | 2015 |
| Nitrate | MR | 5 | 2022 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2021 |
| TTHM | MR | 4 | 2021 |
| Lead and Copper Rule | MR | 3 | 2019 |
| Revised Total Coliform Rule | MON | 2 | 2018 |
| Coliform (TCR) | MCL | 1 | 1992 |
| Picloram | MR | 1 | 2014 |
| Dinoseb | MR | 1 | 2014 |
| Pentachlorophenol | MR | 1 | 2014 |
| 2,4,5-TP | MR | 1 | 2014 |
| Dalapon | MR | 1 | 2014 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.